Iron Mountain Castle in Troubled Times

My father is Shi Dakai, he just died. Three hundred remnant soldiers, five thousand Qing troops, a pile of scattered sand. The Yi people were waiting to pick up the leaks on the other side of the mountain, and someone inside wanted to run away. They said: Young Master, wait to die or run? I picked up a rusty knife and carved three lines on the stone. The first line, dividing the fields. The second line is to support the family. The third line, heaven and earth learn from each other. Then I said: Why are you running? Give me three years. Three years later, 20,000 Qing troops pressed into the territory. I took out the breech-loading gun, the telegraph network, and the mobilization system. Zhou Muhe, the commander-in-chief of the Qing army, looked at the corpses on the ground and said, "You are more ruthless than your father." I said: "You just know?" (Travel + farming + hegemony + infrastructure, no female protagonist, stable updates every day)